The 1968 United States Senate elections were elections for the United States Senate. Held on November 5, the 34 seats of Class 3 were contested in regular elections. They coincided with the presidential election of the same year. The Republicans picked up five net seats in the Senate. This saw Republicans win a Senate seat in Florida for the first time since Reconstruction.
The 1938 United States Senate elections occurred in the middle of Franklin D. Roosevelt's second term. The 32 seats of Class 3 were contested in regular elections, and special elections were held to fill vacancies. The Republicans gained eight seats from the Democrats, though this occurred after multiple Democratic gains since the 1932 election, leading to the Democrats retaining a commanding lead over the Republicans with more than two-thirds of the legislative chamber.
The 1932 United States Senate elections in Arizona took place on November 8, 1932. Incumbent Democratic U.S. Senator Carl Hayden ran for reelection to a second term, again defeating his 1926 challenger former U.S. Senator Ralph H. Cameron in the general election.
The 1952 United States Senate election in Arizona was held on November 4, 1952. Incumbent Democratic U.S. Senator and Senate Majority Leader Ernest McFarland ran for re-election to a third term, but was defeated by the Republican nominee and future candidate for President of the United States, Barry Goldwater.
The 1922 United States Senate elections in Arizona took place on November 7, 1922. Incumbent Democratic U.S. Senator Henry F. Ashurst ran for reelection to a third term, defeating Republican nominee James Harvey McClintock in the general election by a wide margin.
The 1928 United States Senate elections in Arizona took place on November 6, 1928. Incumbent Democratic U.S. Senator Henry F. Ashurst ran for reelection to a fourth term, defeating Republican nominee former U.S. Senator Ralph H. Cameron in the general election. Cameron was defeated in the previous election year, in 1926, by then-U.S. Congressman Carl T. Hayden, leading Cameron to decide to challenge Ashurst in order to return to the United States Senate.
The 1934 United States Senate elections in Arizona took place on November 3, 1934. Incumbent Democratic U.S. Senator Henry F. Ashurst ran for reelection to a fifth term, defeating Republican nominee Joseph Edward Thompson in the general election by a wide margin.
The 1940 United States Senate elections in Arizona took place on November 5, 1940. Incumbent Democratic U.S. Senator Henry F. Ashurst ran for reelection to a sixth term, but was defeated in the Democratic primary to challenger Ernest McFarland.
The 1964 United States Senate election in Arizona took place on November 3, 1964. Incumbent Republican U.S. Senator Barry Goldwater decided not to run for reelection to a third term, instead running for President of the United States as the Republican Party nominee against Lyndon B. Johnson. Governor of Arizona Paul Fannin ran unopposed in the Republican primary, and defeated Democratic nominee Roy Elson, who was a staff member for U.S. Senator Carl Hayden until Hayden's retirement in 1969.
The 1970 United States Senate election in Arizona took place on November 3, 1970. Incumbent Republican U.S. Senator Paul Fannin decided to run for reelection to a second term, running unopposed in the Republican primary. Fannin defeated Democratic nominee Sam Grossman in the general election. This would be the last time until the Republican Revolution of 1994 that Republicans would win Arizona's Class 1 Senate Seat.
The 1920 United States Senate elections in Arizona took place on November 2, 1920. Incumbent Democratic U.S. Senator Marcus A. Smith ran for reelection to a third term, but was defeated by former Delegate to the U.S. House of Representatives from the Arizona Territory Ralph H. Cameron in the general election. Cameron would become the first Republican elected to the office of U.S. Senator from Arizona since the state joined the union in 1912. The same year, Republican Governor Thomas Edward Campbell was reelected to a second term.
The 1926 United States Senate election in Arizona was held on Tuesday November 3, Incumbent Republican Senator Ralph Cameron ran for re-election on his second term, but was defeated by incumbent Democratic Representative Carl Hayden in the general election. Hayden was the longest-serving Senator having been re-elected to six more terms until he retired in 1968.
The 1944 United States Senate election in Arizona took place on November 7, 1944. Incumbent Democratic U.S. Senator Carl Hayden ran for reelection to a fourth term, defeating Republican nominee Fred Wildon Fickett Jr., in the general election.
The 1956 United States Senate election in Arizona took place on November 6, 1956. Incumbent Democratic U.S. Senator Carl Hayden ran for reelection to a sixth term, defeating Republican nominee Attorney General of Arizona Ross F. Jones in the general election.
The 1950 United States Senate elections in Arizona took place on November 7, 1950. Incumbent Democratic U.S. Senator Carl Hayden ran for reelection to a fifth term, defeating Republican nominee Bruce Brockett in the general election. Brockett was formerly the Republican nominee for governor in both 1946 and 1948.
The 1968 United States Senate election in Arizona took place on November 5, 1968. Incumbent Democratic U.S. Senator Carl Hayden did not run for reelection to an eighth term, with his longtime staff member Roy Elson running as the Democratic Party nominee to replace him. Elson was defeated by a wide margin, however, by former U.S. Senator and 1964 Republican presidential nominee Barry Goldwater. Prior to Goldwater's election, the seat had been held for decades by the Democratic Party under Carl Hayden, but after this election remained in Republican Party control continuously for 52 years, until Democrat Mark Kelly won in the 2020 special election.
The 1962 United States Senate election in Arizona took place on November 6, 1962. Incumbent Democratic U.S. Senator Carl Hayden ran for reelection to a seventh term, defeating Republican State Senator Evan Mecham in the general election. Mecham became Governor of Arizona more than two decades later, and was subsequently impeached and removed from office.
The 1980 United States Senate election in Arizona took place on November 4, 1980. Incumbent Republican Senator Barry Goldwater decided to run for reelection to a third consecutive term, after returning to the Senate in 1968 following his failed presidential run in 1964 against Lyndon B. Johnson. Despite Republican presidential nominee Ronald Reagan's landslide win in Arizona, Goldwater defeated Democratic Party nominee Bill Schulz in the general election by a narrow margin, which later caused Goldwater to decide against running for reelection to a fourth consecutive term. Goldwater won only three counties, including Maricopa County.
The 1916 United States Senate elections in Arizona took place on November 7, 1916. Incumbent Democratic U.S. Senator Henry F. Ashurst ran for reelection to a second term, defeating Republican former Territorial Governor Joseph H. Kibbey in the general election by a comfortable margin.
The 1964 Arizona gubernatorial election took place on November 3, 1964. Incumbent Governor Paul Fannin decided not to run for reelection to a fourth term as governor, instead deciding to successfully run for the United States Senate when incumbent U.S. Senator Barry Goldwater decided to run for President of the United States.
